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What Is Coarse-Grained Rock?

(a) said of a crystalline rock, and of its texture, in which the individual minerals are relatively large; specif. Said of an igneous rock whose particles have an average diameter greater than 5 mm (0.2 in.).

What Is Coarse-Grained Rock?

A coarsegrained rock is a rock that has a large grain size. The term can be used to describe either igneous or sedimentary rocks.

Igneous rocks are made of solidified lava or magma, while sedimentary rocks are made of particles that have been deposited by water, wind, or ice.

Grain size is an important property of rocks because it affects the rocks texture, strength, and porosity. Rocks with large grains are usually stronger and less porous than those with small grains.

Coarsegrained rocks are often used in construction because of their strength. Granite is a common type of coarsegrained igneous rock.

It is made of large crystals of quartz, feldspar, and other minerals. Granite is very strong and durable, making it a popular choice for countertops and flooring.

Sandstone is a common type of coarsegrained sedimentary rock. It is made of large grains of sand that have been cemented together. Sandstone is often used in construction because of its strength and durability.

Porphyry is another type of coarsegrained igneous rock. It is made of large crystals of feldspar

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